Photographic material with bleachable dye

ABSTRACT

WHEREIN A, K, B, M, X and Z each denotes an aromatic residue, the residues A-N N-B-NH-CO- and K-N N-M-NH-CO contain groups which confer solubility in water, and Y denotes a water solubility imparting bridging group consisting of at most 4 members. Above all this photographic material is suitable for the silver dyestuff bleaching process and the dyestuffs are incorporated therein mainly as yellow, magenta or cyan image dyestuffs. Photographic, light-sensitive material is provided which contains on a support at least one silver halide layer and at least one layer containing a dyestuff of the formula

[ 5] Jan. 22, 1974 PHOTOGRAPHIC MATERIAL WITH BLEACHABLE DYE [21] Appl. No.: 221,429

Related US. Application Data [63] Continuation-in-part of Ser. No. 46,453, June 15, 1970, abandoned, which is a continuation-in-part of Ser. No. 734,205, June 4, 1968, abandoned.

[30] Foreign Application Priority Data June 7, 1967 Switzerland 8065/67 Jan. 18, 1968 Switzerland 757/68 [52] US. Cl. 96/99 [51] Int. Cl. G03C 1/10 [58] Field of Search 96/99 [56] References Cited UNITED STATES PATENTS 3,264,109 8/1966 Anderau et al. 96/99 2,294,892 9/l942 Carroll et al 96/99 3,322,543 5/1967 Anderau et al. 96/99 3,443,953 S/l969 Loeffel et al. 96/99 FOREIGN PATENTS OR APPLICATIONS 682,665 11 1952 Great Britain 96/99 Primary Examiner-J. Travis Brown Assistant Examiner-Richard L. Schilling Attorney, Agent, or Firm-Joseph G. Kolodny et al.

[5 7] ABSTRACT Photographic, light-sensitive material is provided which contains on a support at least one silver halide layer and at least one layer containing a dyestuff of the formula wherein A, K, B, M, X and Z each denotes an aromatic residue, the residues AN=NBNH-CO and KN=NMNH-CO contain groups which confer solubility in water, and Y denotes a water solubility imparting bridging group consisting of at most 4 members.

Above all this photographic material is suitable for the silver dyestuff bleaching process and the dyestuffs are incorporated therein mainly as yellow, magenta or cyan image dyestuffs.

13 Claims, No Drawings PHOTOGRAPH: MATERIAL WITH BLEACHABLIE DYE This application is a continuation-in-part of our co pending patent application Ser. No. 46,453 filed on June 15, I970, now abandoned, which in its turn is a continuation-in-part of our patent application Ser. No. 734,205 filed on June 4, 1968, now abandoned.

This invention provides disazo dyestuffs of formula wherein A and K each denotes an aromatic residue containing 1 to 3 acidic groups which confer solubility in water, B and M each denotes an aromatic residue and X and Z' each denotes a monocyclic benzene residue.

These dyestuffs may be of unsymmetrical structure or especially of symmetrical structure. They contain at least in the terminal residues A and K acidic groups which confer solubility in water, for example carboxylic acid groups or especially sulphonic acid groups.

Depending on their composition, the dyestuffs of formulae l) to (4) absorb in the most diverse wavelength ranges. Dyestuffs which as a rule are yellow preferably correspond to the formula Disazo dyestuffs of especial interest contain the residue Y, as the water solubility imparting bridge member which corresponds to one of the formulae wherein n denotes an integer having a value of at most 4. The invention also includes the metal complexes of dyestuffs of formula (1). Particularly valuable disazo dyestuffs are those of formula wherein A, and K, each denotes a benzene or naphthalene residue, B, and M, each denotes a benzene, diphenyl or naphthalene residue, the residues A, and K, contain l to 3 acidic groups which confer solubility in water and/or the residues B, and M, contain 1 or 2 acidic groups which confer solubility in water, and Y, has the significance mentioned above.

The invention also includes symmetrical disazo dyestuffs, namely dyestuffs of formula wherein A,, B, and Y, have the significance mentioned above and wherein the residue A, contains 1 to 3 acidic groups which confer solubility in water and/or the residue B, contains 1 or 2 acidic groups which confer solubility in water.

In particular, good disazo dyestuffs also contain the water solubility imparting residue Y which corresponds to one of the residues -CH NH, -S-, -SS or SQ,.- as a bridge member.

Amongst the dyestuffs of formulae (1) to (3), those having a -SO group as a bridge member are of particular interest. They preferably correspond to the formula H033 in i It, l tz V V SOaH are to be mentioned, wherein R, represents a hydrogen atom, a nitro group, a halogen atom or a sulphonic acid group, R represents a hydrogen atom, a halogen atom, an alkyl, alkoxy, hydroxyalkoxy or alkoxyalkoxy group having in each case I to 5 carbon atoms in the alkyl residue, a phenoxy group, a hydroxyacetic acid residue, an

acetic acid residue or an acylamino group, in which acyl represents the residue of an aliphatic carboxylic acid having 1 to 5 carbon atoms or a benzene-, pyridine-, furaneor thiophene-carboxylic acid which may be substituted, R denotes a hydrogen atom or an alkyl, alkoxy or acylamino group, in which acyl has the significance above mentioned, and Y, also has the significance above mentioned.

Of the dyestuffs of formula (5), those should especially be mentioned when Y, is Y which has the significance indicated above, or above all a water solubility imparting residue Y, which represents a SO --Cl-l S or --S-S group as a bridge member.

Preferred yellow dyestuffs correspond to the formula wherein R, denotes a chlorine atom, a methyl, methoxy or acetylamino group, and Y denotes a residue of formula SO CH S or -S-S.

The disazo dyestuffs of formula are particularly valuable. ln formula (9) R, denotes a hydrogen atom, a nitro group, a sulphonic acid group or optionally a halogen atom, R denotes a hydrogen atom, a halogen atom, an alkyl, alkoxy, hydroxyalkoxy, alkoxyalkoxy or acylamino group, and R denotes a hydrogen atom, an alkyl group, an alkoxy group or an acylamino group. Here, the disazo dyestuffs of formula S OzH wherein R,, R and R have the significance above mentioned, for example the dyestuffs of formula wherein R, and R each denotes an alkoxy or acylamino group, are preferred.

When R represents an alkyl or alkoxy group, this group is advantageously one containing 1 or 2 carbon atoms. Halogen atoms R are preferably chlorine atoms. When acylamino groups are present as substituents R and/or R these are for example derived from low molecular weight fatty acids having 1 to 5 carbon atoms, and indeed carbon-containing substituents R and R also generally appropriately contain at most 5 carbon atoms.

The residues A, K, A,, K,, A A, K, A, and K, in yellow dyestuffs of formulae (1) to (ll) are for example derived from the following amines: 2- aminonaphthalene-4, 8-disulphonic acid, 2-amino-6- nitronaphthalene-4, 8-disulphonic acid, 2-amino-6- chloronaphthalene-4,8disulphonic acid, Z-aminonaphthalene-5,7-disulphonic acid, l-aminonaphthalene-3,6-disulphonic acid, 2- aminonaphthalene 4,6,8-trisulphonic acid, 1-

aminobenzene-3,S-dicarboxylic acid, l-aminobcnzene- 2-sulphonic acid and laminobenzenc-Z,5-disulphonic acid.

The residues B, M, B,, M,, 8,, B, M, B, and M, of formulae (l to (l l) are for example derived from the following amines: aminobenzene, l-amino-Z- methylbenzene or l-amino-3-methylbenzene, l-amino- 2, S-dimethylbenzene or l-amino-Z -dimethylbenzene, l-amino-Z-methoxylbenzene or lamino-3-methoxybenzene, l-amino-2- ethoxybenzene, lamino-2-B-hydroxyethoxybenzene, l-amino-2-B-methoxyethoxy-S-methylbenzene, lamino-3-acetylaminobenzene, l-amino-3 nbutyrylaminobenzene, l-amino-3- propionylaminobenzene, l-amino-3-isobutyrylaminobenzene, l-amino-3-aeetylamino-6- methyl-benzene, l-amino-3-propionylamino 6- I, methylbenzene, l-amino-3(3-carboxy)- propionylaminobenzene, l-amino-3-n-butyrylamino-6- I1 methylbenzene, 1-amino-3-isobutyrylamino-6- wherein A, denotes a naphthalene residue containing methylbenzene, l-amino-2-acetylamino-5- 5 l or 2 sulphonic acid groups of which one may be re methylbenzene, l-amino-2-propionyl-amino-5- placed by a sulphonic acid amide group and l or 2 hymethylbenzene, 1-amino-2-n-butyrylamino-5-methyldroxyl groups and/or a residue of formula NH-U benzene, l-amino-2-isobutyrylamino-5- wherein U represents a hydrogen atom or an alkyl, methylbenzene, l-amino-Z-methyl-S- phenyl or acyl residue, B denotes a benzene or diphemethoxylbenzene, l-amino-3-chlorobenzene, l-aminol nyl residue which may contain a halogen atom, a sul- 2-chloro-5-methoxybenzene, l-amino-2-methoxy-5- phonic acid group, or an alkyl or alkoxy group containchlorobenzene, l-amino-2,S-dimethoxybenzene, ing 1 to 5 carbon atoms in each case, and Y has the sigl-amino-2,S-diethoxybenzene, l-arnino-2,5- nificance above mentioned. diacetylaminobenzene, l-aminonaphthalene, 2- Particular interest attaches to dyestuffs of formula aminonaphthalene-7-sulphonic acid, l-aminobenzenel5 12) which contain the residue Y which has the signifi- 2-methyl-hydroxyacetic acid, l-amino-2-methoxy-5- cance above mentioned, or especially the residue Y phenoxybenzene, and the residues B, M, 8,, M and B hi h represents a -SO CH S or may also be derived from N-3-amino-4- S- S- residue as a bridge member. methylphenylurea. Valuable dyestuffs are above all those of formula Dyestuffs which as a rule yield red or magenta shades (15) H II I] preferably correspond to the formula fi WhlCh in general yield magenta shades. In this formula A"N=N B3 NI'I'0C A and K each denotes a naphthalene residue which Y1 in the l-position is bound to the azo group, in the 2- position contains an amino group, in the 8-position wherein A denotes a naphthalene residue which concontains Q y y group f fiddltlonany of 2 tains at least one hydroxyl group and/or a residue of Phonic acld g p and 2 2 2 and z each f l notes a monocyclic benzene residue. The amino group in the 2-position may be primary, secondary, for example a monoalkylamino or monophenylamino group, or

(13) tertiary, for example a dialkylamino group. The monocyclic benzene residues, especially B and M may U? have further substituents, for example halogen atoms m for example chlorine, alkyl groups for example ethyl or wherein U, represents a hydrogen atom, an alkyl, methyl, alkoxy groups for example ethoxy or methoxy phenyl, alkylphenyl, acyl, hydroxyalkyl or cycloalkyl or sulphonic acid groups. residue and U represents a hydrogen atom or-an alkyl Particular significance attaches to the magenta dyeor hydroxyalkyl residue, 8;, denotes a benzene, naph- 49 stuffs of formula 0H II II NH-C (I? C-HN N=N- s N=N R0 0 l s LEN-R7 R5 R5 R1--NH thalene or residue may contain a 5516 wherein R denotes a hydrogen atom or a sulphonic gen atom or an alkyl or alkoxy residue, the residues A 50 acid group, R denotes a hydrogen atom, an alkyl and 3;, together contain 1 to 3 sulphonic acid groups of group or a benzene residue and R denotes a hydrogen which one may be replaced by a sulphonic acid amide atom, a halogen atom, an alkyl group or a sulphonic group, and Y, has the significance mentioned above. acid group. Here the disazo dyestuffs of formula 1103s SOaH NH- s CHN l Ra Hi l-R1 Ra R5 R7'I IH Re Amongst these are to be mentioned magenta dyewherein R R and R have the significance menstuffs of formula tioned above, are preferred, especially those of formula 7 8 (18) E035 SIOIH I HN-R7' SOKH H015 7"- for example the dyestufls of formulae 19 H038 SOaH O H H ll OH HIII-C ISl NH HO O Q wherein R9 denotes a group of formulae HaC HaC Ha Hz 7 V The residues A, K, A K A, K, A K A and A, In the case of the aminonaphthalenes, the correin the magenta dyestuffs of formulae (l) to (4) and sponding acyl derivatives can also be used.

(12) to (20) are for example derived from the follow- The residues B, M, 8,, M,, B, M, B M 8,, and ing coupling components: 2-amino-8- B in the magenta dyestuffs of formulae (l to (4) and hydroxynaphthalene-6-sulphonic acid, 2-(2'- (12) to (20) are for example derived from the followmethylphenylamino)-8hydroxynaphthalene-6- ing diazo components containing nitro groups: 1- sulphonic acid, 2-(2,6-dimethylphenylamino)-8- amino-4-nitrobenzene2-sulphonic acid, l-amino-S- hydroxynaphthalene-6-sulphonic acid, 2-( 2', nitrobenzene-Z-sulphonic acid, l-amino-4- 6-diethylphenylamino)-8-hydroxynaphthalene-6- nitrobenzene, lamino-2-methyl-4-nitrobenzene, 1- sulphonic acid, 2-(2' 4 6'-trimethylphenylamino)-8- amino-2-methoxy-4-nitrobenzene and l-amino-2- hydroxynaphthalene-6-sulphonic acid, 2-(2' 3' 4 4Q chloro-4-nitrobenzene. Instead of these diazo compo- 6'tetramethylphenylamino)8-hydroxynaphthalene-6- nents benziding-3-sulphonic acid for example may also sulphonic acid, 2-dimethylamino-8- be used.

hydroxynaphthalene6-sulphonic acid, 2-diethylamino- Particularly suitable combinations of A and B are S-hydroxynaphthalene-6-sulphonic acid, 2-B- for example provided by the residues of formula hydroxyethylamino-8hydroxyna hthalene-6- sulphonic acid, 2-n-butylamino-8 hydroxynaphthalene- (21) N N B3 NH CO I 6-sulphonic acid, 2-cyclohexylamino-8- hydroxynaphthalene6-sulphonic acid, 2-(2',6- NH-Codimethylphenylamino)-8-hydroxynaphthalene-3,6-

disulphonic acid, 2-methylamino-8- N:N hydroxynaphthalene-6-sulphonic acid, NHG0 G3 2-amino-8-hydroxynaphthalene- 3,6- or -5,7

disulphonic acid, 2-amino-8-hydroxynaphthalene- 7- sulphonic ucid S-nulphouumide, Z-amino-iim hytlroxynaphlhulcnc-S-sulphonic acid, Z-di-(fl- W 1 hydroxyethylamino)-8-hydroxynaphthalene-6- (23 r sulphonic acid, l-amino-8-hydroxynaphthalene-2,6- F h O disulphonic acid, lamino-8-hydroxynaphthalene-3,6-

disulphonic acid, lamino-8-hydroxynaphthalene-4,6- fiAqHGQ SOEH disulphonic acid, 1amino-8hydroxy-naphthalene-2,5-

disulphonic acid, lamino-8-hydroxynaphthalene-4- X sulphonic acid, lamino-Shydroxynaphthalene-7- H03 G1 sulphonic acid, 2-amino-5hydroxynaphthalene-7- (24) GNH OH sulphonic acid, 2aminonaphthalene-6-sulphonic acid, 2-hydroxynaphthalene-4- or 6- or 7-sulphonic acid, N=N 2-hydroxynaphthalene-3, 6- or 6,8-disulphonic acid, I, 11038 7-dihydroxynaphthalene-3,6-disulphonic acid and 1,8- 1 dihydroxynaphthalene-3,6-disulphonic acid. G1

A -N=N-B NHCO residues which correspond to the following formulae:

In formula (34) Me denotes a copper or chromium atom, that is to say the disazo dyestuffs in question may also in part be metal complexes, preferably copper complexes, 0,, denotesa hydrogen atom, an alkyl, alkoxy or acylamino residueor a halogen atom, and G denotes a hydrogen atom or an alkyl, alkoxy or acylamino residue.

Blue or bluish-green dyestuffs of formula I as a rule preferably correspond to the fonnula wherein A, denotes a naphthalene residue which contains l or 2 sulphonic acid groups, at least one hydroxyl group and a residue of formula O-U, or Nl-l-U in whichU, represents a hydrogen atom, an alkyl or aralkyl group and U, a hydrogen atom, an alkyl, hydroxyalkyl, phenyl or acyl residue, 3, denotes a benzene residue which contains at least one alkyl, alkoxy or acylamino residue or a naphthalene residue which contains 1 or 2 sulphonic acid residues and a hydroxyl group, and Y, has the significance above mentioned.

Amongst the bluish-green dyestuffs of formula (36) those are to be emphasised which contain as a bridge member the residue Y which has the significance above mentioned or especially the residue Y which represents a S0 CH,, S- or --S-S residue.

The residues A, K, A,, K, and A of the bluish-green.

dyestuffs of formulae (1), (2), (3) and (36) are for example derived from lamino-8-hydroxynaphthalene-2,4- 3,6- or 4,6-disulphonic acid.

The amino group present in the l-position may be a primary amino group, or, especially in the case of the 3, 6- and the 4,6-disulphonic acid, also an amino group which is further substituted, for example a monoalkylamino or dialkylamino group for example monomethylamino or dimethylamino, monoethylamino or diethylamino, a B-hydroxyalkylamino group for example B-hydroxyethylamino, a phenylamino group or especially an acylamino group for example an acetylamino or propionylamino group. Amongst the acylamino groups those must be especially mentioned which contain a benzene nucleus which may be further substituted, for example benzoylamino, dichloro-benzoylamino and ptoluenesulphonylamino groups.

Furthermore the A- and K-residues of the bluishgreen dyestuffs may also for example be derived from the following components: l,8-dihydroxynaphthalene- 3,6-disulphonic acid, l-hydroxy8- methoxynaphthalene-3,6-disulphonic acid, l-hydroxy- 8-benzyloxynaphthalene-3,6-disulphonic acid, 2- amino-8-hydroxynaphthalene-6-sulphonic acid, 2- amino-X-hydroxynapthalcnc-3,6-disulphonic acid and 2-acetylamino-5-hydroxynaphthalenc-4,8-disulphonic acid.

In the case of bluish-green dyestuffs the residues B, M, B M, and B are for example derived from the following components: l-amino-2-methoxy-5-methyl-4- nitrobenzene, l-amino-2,5-dimethoxy-4-nitrobenzene, l-amino-2,5-dimethoxy-4-nitrobenzene, l-amino-2,5- diethoxy-4-nitrobenzene, l-amino-2,5-dimethoxy-4- acetylaminobenzene, l-amino-2-methoxy-4- acetylamino-S-phenoxybenzene, as well as 2-nitro-6- aminonaphthalene-4,8-disulphonic acid.

Suitable combinations of A with 8,, for example lead to the following residues of formula A N=NB N- In formulae 37) to (39) 0, denotes a hydrogen atom or a sulphonic acid group, G and 0,; independently of one another each denotes a hydrogen atom or an alkyl, aryl or acyl residue, in which however G only represents an acyl or aryl residue when G denotes a hydrogen atom, G denotes an alkyl residue, G a hydrogen atom, an alkyl or aralkyl residue, G a hydrogen atom, an alkyl or alkoxy residue, and Me a nickel atom or especially a copper atom. This means that the bluishgreen dyestuffs of formula (1) can also in part be metal complexes.

Furthermore the residues A, K, X, Z and especially B and M in formula (1) may, apart from aromatic residues, also represent heterocyclic residues.

The yellow, magenta and bluish-green dyestuffs of formula (1) may be all manufactured according to the same processes. In one process compounds of formulae wherein A, B, K and M have the significance above mentioned, are condensed with dicarboxylic acid dihalides of formula wherein Q denotes a halogen atom and X, Y and Z have the significance above mentioned. These dyestuffs may be converted into the metal complex compounds.

The condensation is effected according to known methods and is advantageously carried out in a polar solvent for example water or especially a polar organic solvent for example methanol, glycol, dimethylformamide, diethylacetamide or N methylpyrrolidone. It is also advantageous to effect the condensation in the presence of acid-binding reagents for example tertiary amines or alkali metal carbonates. The condensation may also be carried out in solvents which themselves act as acid-binding reagents, for example pyridine or the N-methylpyrrolidone which has already been mentioned.

The conversion to the metal complex compounds is carried out according to known methods for example in baths containing copper sulphate.

The manufacture of the aminoazo dyestuffs of formulae (40) and (41) is also carried out according to known methods for example by combinding a diazo compound of an amine of formula A-Nl-l, or KNl-l wherein A and K have the significance above mentioned, advantageously in an acid medium, with a monoamine capable of coupling and having the formula H-B-NH, or H-M-Ni-l wherein B and M have the significance above mentioned. Another method for example consists of coupling diazo compounds of nitro compounds of formulae H-B-NO or H-M-NO with compounds of formula H-A-NH, or H-l(Nl-l wherein B, M, A and K have the significance above mentioned, in an acid medium and reducing the nitro group in the nitro-azo dyestuff thus obtained to an amino group.

The manufacture of the dicarboxylic acid dihalides of formula (42) may be carried out according to known methods.

Symmetrical dyestuffs of formula (4), and also mixtures which in addition to symmetrical dyestuffs contain a symmetrical dyestuffs of formula (4), may be manufactured by condensing in a molecular ratio of 2 l aminomonoazo dyestuffs of formula wherein A, B, K and M have the significance above mentioned, with dicarboxylic acid dihalides of formula Halogen--JU- g Z fl-Ha1ozen wherein X and Z have the significance above mentioned.

The disazo dyestuffs of formula (1) may be used for various purposes, for example in photographic materials, and are particularly advantageous as image dyestuffs for the silver colour bleaching process. Accordingly, valuable photographic materials which contain at least one layer having a dyestuff of formula (1) on a support, can be manufactured by known methods.

In particular, the disazo dyestuffs may be present in a multi-layer material which contains on a layer support, a layer coloured with a greenish-blue dyestuff which is selectively sensitive to red, above this a magenta coloured layer which is selectively sensitive to green, and finally a yellow-coloured layer which is selectively sensitive to blue.

At the same time, disazo dyestuffs of formula 1) may be used in only one layer or in two layers or in all three layers. Dyestuffs of formulae (1) to (4) may be employed in all three layers, whilst dyestuffs of formula (36) are only suitable for the layer which is sensitive to red, dyestuffs of formulae 12) and are only suitable for the layer which is sensitive to green and dyestuffs of formulae (5) to 1 1) are only suitable for the OCH;

layer which is sensitive to blue.

by weight to the parts by volume is as that of g to ml.

EXAMPLE I 0.75 parts of diphenylmethane (l,l')-3.3'- dicarboxylic acid dichloride are added in 10 minutes to a solution of 2.25 parts of the disodium salt of the monoazo dyestuff of formula OCH;

H 00 S OaH HOaS Absorption maximum in dimethylformamide-water The dyestuffs of formula (1) may also be incorpomixture (1:1 ):400 nm.

rated in an auxiliary layer or especially in a layer adjacent to a light-sensitive layer.

The dyestuffs of formula (1) are very resistant to diffusion in the usual layers. They do not tend to change into an opalescent to cloudy form in gelatine layers on drying and storage, and they can easily be reduced in a bleaching bath to give decomposition products which are harmless and/or easily washed out.

The dyestuffs of formula (1) are distinguished by high colour intensity and purity of shade. Grey shades which appear neutral to the eye over the whole density range can therefore be produced for example by means of combination of a yellow dyestuff of formula (6) with a suitable magenta dyestuff and a suitable greenish-blue dyestuff.

Compared with other disazo dyestuffs the dyestuffs of formula (1) are very especially distinguished by their w l i ma Ho s good solubility and compatibility with cations, especially calcium ions.

Absorption maximum in gelatinec408 nm.

| a NHz H035 are used and 2 parts of dyestuff of formula (49) are obtained as a dark red powder. 7

, Germ 5 .2

Absorption maximum in dimethylformamide-water mixture (1:1):519 nm.

In the examples which follow the parts denote parts Absorption maximum in gelatinez526 nm.

by weight and the percentages denote percentages by weight unless otherwise stated. The relation of the parts The dyestuffs of formulae (50 to (52) are obtained in an analogous manner.

Absorption maximum in- DM F-H O (1 1) according to formula (3) 50 .t H038 C,H2

NH; H038 51 -s- 52. -s-s EXAMPLE 3 4,4'-dicarboxylic acid dichloride are added to the solu- 2l.9 parts of monoazo dyestuff f f l tion during minutes. The mixture is stirred for 20 minutes at room temperature and the dyestuff is pre- H a cipitated by adding 550 parts by volume of acetone. On

reprecipitation from water by means of potassium acetate and, optionally, chromatographic purification, NW N N] about 26 parts (90 percent) of pure dyestuff of forw mula (19) are obtained as a violet crystal powder. The NH: 11033 absorption maximum in dimethylformamide-water mixture (1:1) is about 520 nm.

The dyestuffs of Table II can be manufactured in the are dissolved in 500 parts by volume of N-methyl-Z- same manner (the absorption maxima again apply to pyrrolidone and 8.6 parts of diphenylsulphone-(l,l dimethylformamide-water, 1: l

TABLE II Absorption maxlmum, Number Formula nm.

S02 W \S 3H .2

I /S 02 \l/ S 03H 2 56 r'Hois 39s /\-N= --NHCO /S O: V H- s 03H .i2

57 HO s s 07 Y HaC-C 0-NH II03S 2 58 IIOIIS 39 /S ()2 IIrCz-CONII 50. Hols 043m 394 plate of l3 cm 18 cm, and is dried.

v 7 Table ll-Continued Absorption maximum, Number Formula nm.

NHz SOaH J2 70 V. FHOZS 5'22 OH mlv-c =N $01 CH1 sour lIN- cm l 1m: -2

71 "llOqh son -IIO3S NH:

72 HOQs 514 OH S02 HOsS NH; CH3

4103s NH; -cm J2 -110 5 Nil; 3:1 i2

SOz-ITIII OH OCH;

N-N NH 00G S02 H0 8 S 01H CH3 2 EXAMPLE 4 0.7 ml of a 1 percent aqueous solution of the dyestuff N0. 60 of Table II are added to 3.3 ml of a 6 percent aqueous gelatine at 40C. 3.3 ml of a gelatine-silver bromide emulsion at 40C are added thereto, and, optionally l to 2 ml of an aqueous solution of a spreading agent, for example saponin, and of a hardener, for example dimethylol urea. This mixture is cast onto a glass 6 The material is then exposed to light behind a step wedge, and the silver image is developed in a l-methyl- The image dyestuff is bleached in a bath which con- 60 tains in 1000 parts by volume, to 100 parts by volume of 32 percent hydrochloric acid, to 120 parts of potassium bromide, 30 to parts of thiourea and 0.001 to 0.01 part of 2-amino-3-hydroxyphenazine, de-

5 pending on the amount of silver present.

After an intermediate washing, the excess silver is removed in a bath which contains in parts by volume, 100 parts of sodium chloride, 100 parts of crystalline copper sulphate and 50 parts by volume of 37 percent The gelatine layers may also contain additives for exhydrochloric acid. The material is finally fixed in the ample wetting agents, hardeners and stabilisers for the usual manner. A yellow colour wedge is obtained, silver halide. In other respects the procedure followed which represents an inverted image of the original silis that the individual layers contain for each square ver wedge and which is completely bleached in the metre of film, 0.5 g of the particular dyestuff and an original areas of highest density of silver. Such a yellow amount of silver bromide which corresponds to l to 1.2 image can also be part of a multi-colour material. g of silver.

Similar results are obtained when instead of the dye- This m iS xp d o ig nde a Co ure diaPOSistuff of formula (60) dyestuffs No. 54 to 66 of Table II tive i g r gr n n l pying ligh Th reaf r are used. the copy is developed in accordance with the following instructions: EXAMPLE 5 1. 6 minutes development in a bath which contains in The instructions of example 4 are followed, but ina litre of water, 50 g of anhydrous sodium sulphite, 0.2

stead of dyestuff No. 60 the dyestuff of formula (19) g of l-phenyl-3-pyrazolidone, 6 g of hydroquinone, 35 obtainable according to example 3 is used. A magenta g of annydrous sodium carbonate, 4 g of potassium broimage is thus obtained which'can also be a component mide and 0.3 g of benztriazole;

image of a multi-colour material. Magenta images can 2. 5 minutes washing;

be produced in the same manner with dyestuffs Nos. 67 3. 6 minutes fixing in a solution of 200 g of crystalline to 74 of Table ll. sodium thiosulphate and g of potassium metabi- 2O sulphite in 1 litre of water; EXAMPLE 6 4. 5 minutes washing; The following layers are suc si l li d to an 5. 3 to 12 minutes colour bleaching with an aqueous soopaque white acetate film pr vided with an dh i lution which contains 50 to 80 g of potassium bromide,

layer: 40 to 80 g of thiourea, 35 to 80 g of 30 percent sul- 1. A silver bromide emulsion in gelatine which is sensip e acid if desired, (mm to 001 g of tive to red, and which contains'the greenish-blue dye- Y yP stuff of formula Q. l 0minutes washing;

2. A colourless gelatine layer without silver halide. 7. 5 minutes bleaching of residual silver with a solution 3. A silver bromide emulsion in gelatine which is sensiof 60 g of crystalline copper sulphate, 80 g of potassium tive to green and which contains the magenta dyestuff bromide and 15 ml of percent hydrochloric acid in of formula 40 one litre of water;

G 0... Ho gm 4. A yellow filter layer which contains the dyestuff of 5 .8- 5 minutes washing; formula 9. 5 minutes fixing as specified under 3;

l0. 5 minutes washing. 01 A light-stable document-fast positive image is obso dyestuff of formula No. 58, the dyestuff of formula No. 3N 47 15 used.

I EXAMPLE 7 The procedure of example 6 is followed but using the 5. A silver bromide emulsion in gelatine which is sensi- 60 magenta dyestuff of Table ll instead of the tained. Q Similar good results are obtained when in place of the N CH=C Q I r i tive to blue and which contains the yellow dyestuff No. magenta dyestuff of formula 7), and using the yellow 58 of Table ll. dyestuff of formula HOaS H3O CH3 $03K (79) N=N NHOO-G0HN-N=N CH: HaC-) SOaH V M. .03 I

in place of the yellow dyestuff No. 58. A light-stable 3. Photographic material as claimed in claim 1 in document-fast image is again obtained. which at least one layer contains a dyestuff of the for- I claim: mula AaN=N-BzNH-OC @C0HNBz-N=NAz l. Photographic, light-sensitive material which comin which A is phenyl, naphthyl, substituted phenyl and prises on a support at least one silver halide layer and substituted naphthyl, the substitutents being selected at least one layer containing a dyestuff of the formula from the group consisting of halogen, alkyl, alkoxy and in which A, and K, each is phenyl, naphthyl, substinitro, and A contains 1 to 3 sulfonic acid groups, B, is tuted phenyl or substituted naphthyl, the substituents phenylene or phenylene substituted by at most two being selected from halogen, alkyl, alkoxy, phenylalkmembers selected from the group consisting of alkyl, oxy, nitro, sulfonyl, hydroxyl, sulfonamide and a group alkoxy, hydroxyalkoxy, alkoxyalkoxy, carboxyalkyl, of the formula v carboxy, phenoxy, halogen or acylamino, acyl being a U, 25 member selected from the group consisting of an aliphatic carboxylic acid containing 1 to 5 carbon atoms,

benzene, pyridine, furane or thiophene carboxylic acid,

U2 or B is naphthalene substituted by alkyl, alkoxy and/or at most 2 sulfonic acid groups, and Y, has the significance indicated in clain l.

4. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula where U, is hydrogen, C,-C alkyl, phenyl, (C,C alkyl phenyl, C,-C hydroxyalkyl, C -C cycloalkyl, or acyl derived from an alkyl carboxylic acid containing 1-5 carbon atoms, benzene carboxylic acid, pyridine carboxylic acid, furane carboxylic acid, thiophene carboxylic acid, benzoylamino, dichloro-benzoylamino or p-toluene-sulfonylamino, U is hydrogen, C, C

alkyl or C,C hydroxyalky], B, and M, each is phenylene, diphenylene, or phenylene, or diphenylene substi- Y,

tuted by at most two members selected from alkyl, alkoxy, hydroxyalkoxy, alkoxyalkoxy, carboxyalkyl, car- 0 boxy, phenoxyy hydrogen acylamino where acyl is 4 in which A315 phenyl, naphthyl, substituted phenyl and selected from aliphatic carboxylic acid containing 1 to Substituted naphthyl, the substituents being Selected 5 carbon atoms, benzene carboxylic acid, pyridine carfrom the group consisting of haloge yl Containing boxylic acid, furane carboxylic acid or thiophene car- 1 0 5 Carbon m alkoxy C Htain ng 1 0 5 a bon boxylic acid, halogen, alkylamino, sulfonic acid alkyl at ms and nitro, and a contains 1 t0 3 sulfonic acid containing 1 to 5 carbon atoms, or sulfonyl, 0r naphgr p B3 iS ph nylene, phenylene u stitut by a thalene or naphthalene substituted by alkyl, or alkoxy member e ed from the group Consisting of alkyl and where A, and K, each contains from 1 to 3 carboxcontaining 1 to 5 carbon atoms, alkoxy containing 1 to ylic acid or sulfonic acid groups and where B, and M, 5 Carbon atoms, y y yff l g 1 t0 5 each contains up to 2 carboxylic acid or sulfonic acid atoms, alkoxyalkoxy contallllllg twlce 1 to 5 groups and Y, is a water solubility imparting bridging boll atoms, cal'boxyalkyl comammg 1 to 5 carbon group selected from (CH,),,, C()- NH atoms, carboxy, phenoxy, halogen or acylamino, acyl O-, -S, SS and -SO,--- and n is an int being a member selected from the group consisting of ger having a value of at m t 4 an alkyl carboxylic acid containing 1 to 5 carbon 2. Photographic material as claimed in claim 1 in atoms, benzene, pyridine, furane and thiophene which at least one layer contains a dyestuff of the forboxylic a i or B3 is naphthalene Substituted y alkyl mula or alkoxy containing 1 to 5 carbon atoms and/or at in which A,, B, and Y, have the significance indicated most two sulfonic acid groups, and Y, has the signifiin claim 1, at least the radical A, contains 1 to 3 carcanoe indic t d i l i 1.

boxylic acid or sulfonic acid groups and/or the radical 5. Photographic material as claimed in claim 1 in B, contains 1 to 2 carboxylic acid or sulfonic acid which at least one layer contains a dyestuff of the forgroups. mula acetylamino and Y has the significance indicated in claim 6.

8. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula atoms, alkoxy containing 1 to 5 carbon atoms or acylamino, acyl in the acylamino groups of R and R being .derived from alkyl carboxylic acid containing 1 to 5 in which R, and R each is hydrogen, chlorine, alkyl containing 1 or 2 carbon atoms, alkoxy containing 1 or 2 carbon atoms or alkylcarbonylamino containing 1 or 2 carbon atoms or in the alkyl radical and Y is a water solubility imparting bridging group selected from 65 7. Photographic material as claimed in claim 6 in which at least one layer contains a dyestuff of the formula in which A, is naphthalene substituted by at least one member selected from the group consisting of hydroxyl and a radical of the formula in which U, is hydrogen, alkyl containing 1 to 5 carbon atoms, phenyl, alkylphenyl containing 1 to 5 carbon atoms in the alkyl radical, hydroxyalkyl containing 1 to 5 carbon atoms, cycloalkyl containing 5 or 6 ring carbon atoms or acyl derived from an alkyl carboxylic acid containing 1 1 to 5 carbon atoms, benzene, pyridine, furane or thiophene carboxylic acid, U is hydrogen, alkyl containing 1 to 5 carbon atoms or hydroxyalkyl containing l to 5 carbon atoms, 8,, is benzene, naphthalene, diphenyl, substituted benzene, substituted naphthalene or substituted diphenyl radical, the substituents being selected from the group consisting of halogen, alkyl containing 1 to 5 carbon atoms or alkoxy containing 1 to 5 carbon atoms, A, and B together contain 1 to 3 sulfonic acid groups, of which at most one is replaced by a sulfonic acid amide group, and Y, has the significance indicated in claim 1.

9. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the for in which A is naphthalene which contains a sulfonic acid group and at least one member selected from the group consisting of a sulfonic amide group, at most 2 hydroxyl groups and a radical of the formula NH-U in which U is hydrogen, alkyl containing 1 to 5 carbon atoms, phenyl or acyl derived from an alkyl carboxylic acid containing 1 to 5 carbon atoms, B is benzene, diphenyl, substituted benzene or substituted diphenyl, the the substituents being halogen, sulfonic acid alkyl containing 1 to carbon atoms or alkoxy U is alkyl containing 1 to 5 carbon atoms or phenylalcontaining 1 to 5 carbon atoms and Y2 is C 2, kyl containing 1 to 5 carbon atoms in the alkyl radical, 2- and U is hydrogen, alkyl containing 1 to 5 carbon Photographic material as claimed in Claim 1 in atoms, hydroxyalkyl containing 1 to 5 carbon atoms. which at least one layer contains a dyestuff of the for- 5 benzoylaminoy di hl b l i or mula toluenesulfonylamino; B is benzene which is substi- HOaS $0311 Q -M-Q I ia N if"? lam k k H h N W Ra R/QIH l io I in which R, is hydrogen or sulfonyl, R is hydrogen, tuted by at least alkyl containing 1 to 5 carbon atoms, alkyl containing 1 to 5 carbon atoms, benzene or benalkoxy containing 1 to 5 carbon atoms or acylamino, zene substituted by l to 3 methyl groups, R, is hydroacyl being derived from an alkyl carboxylic acid having gen, halogen, alkyl containing 1 to 5 carbon atoms or 1 t0 5 carbon atoms, or B is naphthalene which is subsulfonyl and Y is a water solubility imparting bridging stituted by at most 2 sulfonic acid group and hydroxyl group selected from SO CH S and and Y has the significance indicated in claim 1. S-S. l2. Photographic material as claimed in claim 1 suitll. Photographic material as claimed in claim 1 in able for the silver dyestuff bleaching process. which at least one layer contains a dyestuff of the for- 13. Photographic material as claimed in claim 1, in mula which the dyestuff is in a layer also containing silver Ae-N=NB5NH-OC @COHNB -N=NA W Wi 7W t V W. W,

wherein A is naphthalene which contains at most 2 sulhalide.

fonic acid groups, at least one hydroxyl group and a radical of the formula -OU or Nl-lU in which UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION I patent 3,787,215 Dated January 22, 1974 Inventor(s) nhard P1ller It is certified'that error appears in the above-identified patent and that said .Letters Patent are hereby corrected as shown below:

Col. 1, line 4, after "Switzerland" insert assignors to CIBA-GEIGY AG, Basel, Switzerland Claim 8, Col. 26 line +2 delete "11 and substitute Signed and sealed this 3rd day of December 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. c1, MARSHALL DAN'N Attesting Officer Commissioner of Patents FORM powso USCOMM-DC eoa're-pes u s GM'ERMMENT PRINTING [)Fiilk Nb: .7 Mn :14 

2. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 3. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 4. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 5. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 6. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 7. Photographic material as claimed in claim 6 in which at least one layer contains a dyestuff of the formula
 8. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 9. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 10. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 11. Photographic material as claimed in claim 1 in which at least one layer contains a dyestuff of the formula
 12. Photographic material as claimed in claim 1 suitable for the silver dyestuff bleaching process.
 13. Photographic material as claimed in claim 1, in which the dyestuff is in a layer also containing silver halide. 